Datasheet AD8202 (Analog Devices)

High Common-Mode Voltage, Single-Supply Difference Amplifier Data Sheet AD8202 FEATURES FUNCTIONAL BLOCK DIAGRAMS High common-mode voltage range NC A1 A2 +VS −6 V to +28 V at a 5 V supply voltage 7 3 4 6 Operating temperature range: −40°C to +125°C AD8202 100k
Ω
Supply voltage range: 3.5 V to 12 V G =
×
10 G =
×
2 Low-pass filter (1-pole or 2-pole) +IN 8 +IN +IN Excellent ac and dc performance A1 A2 5 OUT –IN 1 –IN –IN ±1 mV voltage offset 10k
Ω
±1 ppm/°C typical gain drift 200k
Ω
200k
Ω
80 dB CMRR min dc to 10 kHz 10k
Ω
Qualified for automotive applications 2
04981-001
APPLICATIONS NC = NO CONNECT GND Transmission control
Figure 1. SOIC (R) Package Die Form
Diesel injection control INDUCTIVE Engine management LOAD 5V CLAMP Adaptive suspension control OUTPUT DIODE Vehicle dynamics control +IN NC +VS OUT BATTERY 14V GENERAL DESCRIPTION 4-TERM AD8202 SHUNT
The AD8202 is a single-supply difference amplifier for amplifying
–IN GND A1 A2
and low-pass filtering small differential voltages in the presence of a
POWER DEVICE
large common-mode voltage (CMV). The input CMV range extends from −6 V to +28 V at a typical supply voltage of 5 V. The AD8202 is available in die and packaged form. The MSOP
COMMON NC = NO CONNECT
04981-002 and SOIC packages are specified over a wide temperature range, Figure 2. High Line Current Sensor from −40°C to +125°C, making the AD8202 wel -suited for use in many automotive platforms.
POWER DEVICE 5V OUTPUT
Automotive platforms demand precision components for
+IN NC +V OUT
better system control. The AD8202 provides excellent ac and
S
dc performance keeping errors to a minimum in the user’s
BATTERY 14V 4-TERM
system. Typical offset and gain drift in the SOIC package are
AD8202 SHUNT
0.3 µV/°C and 1 ppm/°C, respectively. Typical offset and gain drift in the MSOP package are 2 µV/°C and 1 ppm/°C, respec-
–IN GND A1 A2
tively. The device also delivers a minimum CMRR of 80 dB
CLAMP
from dc to 10 kHz.
INDUCTIVE DIODE LOAD
The AD8202 features an external y accessible 100 kΩ resistor
COMMON NC = NO CONNECT
at the output of the Preamp A1 that can be used for low-pass 04981-003 filter applications and for establishing gains other than 20. Figure 3. Low Line Current Sensor
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Document Outline Features Applications General Description Functional Block Diagrams Revision History Specifications Single Supply Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Applications Current Sensing High Line, High Current Sensing Low Current Sensing Gain Adjustment Gains Less than 20 Gains Greater Than 20 Gain Trim Internal Signal Overload Considerations Low-Pass Filtering High Line Current Sensing with LPF and Gain Adjustment Driving Charge Redistribution ADCs Outline Dimensions Ordering Guide Automotive Products